Iron making blast furnace

The structure of blast furnace is made of steel plate and refractory bricks, and its shape is vertical drum like bowling pin. The insides of blast furnace can be divided into hearth, bosh, belly, stock, throat, the top of furnace is installed with furnace top equipment. The bottom of hearth has iron tapping hole, and above this hole there is slag tapping hole, but the location of two tapping holes are not on the same plumb line.
Iron making blast furnace